Schneider N, von Campenhausen C
Zoologisches Institut, Johannes Gutenberg Universität, Mainz, Germany.
Biol Cybern. 1998 Dec;79(6):445-55. doi: 10.1007/s004220050494.
Color and lightness constancy with respect to changing illumination was studied with three different perceptual tasks: ranking of colored papers according (1) to their lightness and (2) to their chromatic similarity in photopic, mesopic, and scotopic states of adaptation, and (3) recognition of remembered colored papers after changes of illumination in photopic vision. Constancy was found in the second task, only. Excitations of light receptors and luminance channels were computed to simulate the empirical rank orders. Results of the first task can be predicted with the hypothesis that luminance channels are activated, if lightness is asked for. Sequences arranged with respect to chromatic similarity were found independent of the illuminant spectra, even if the calculated rank orders of cone excitation were changed in the altered illumination.
针对光照变化的颜色和明度恒常性，通过三种不同的感知任务进行了研究：（1）根据彩色纸张在明视觉、中间视觉和暗视觉适应状态下的明度，（2）根据它们的色度相似性，对彩色纸张进行排序，以及（3）在明视觉中光照变化后，识别记忆中的彩色纸张。仅在第二项任务中发现了恒常性。计算了光感受器和亮度通道的激发，以模拟经验排序。如果要求判断明度，则亮度通道被激活这一假设可以预测第一项任务的结果。即使在改变光照条件下计算出的视锥细胞激发排序发生了变化，按照色度相似性排列的序列也与光源光谱无关。
